If you've ever spent a low-tide walk scanning the sand for that perfect, sun-bleached scallop shell or iridescent junonia to add to your craft stash, you know the giddy thrill of finding a one-of-a-kind beach treasure. I've been beachcombing for as long as I can remember, and for years I grabbed every cool shell I saw, filling buckets with hauls I'd later sort through at home. That changed last spring, when a marine biologist friend pointed out a small hermit crab scurrying across the sand, searching frantically for a new shell after I'd picked up the only intact conch within a 100-foot stretch of the beach. Hermit crabs can't produce their own hard shells, so they rely entirely on empty, intact shells they find on the shore to protect themselves from predators and harsh sun. When those shells are removed, hermit crab populations plummet, which in turn affects the birds, fish, and mammals that prey on them. Empty shells also play a far bigger role in shoreline health than most people realize: broken shell fragments stabilize sand dunes and prevent erosion, shell debris provides critical calcium for shorebirds to build strong eggshells, and even the tiniest shell fragments form the base of the intertidal food web. That conversation kicked off months of research into low-impact shell collecting practices, and the strategies below let me keep enjoying my favorite beach pastime without harming the ecosystems I love visiting. They're simple, require no extra gear, and work for every type of beach, from rocky New England coasts to soft-sand Gulf shores.
Only take fully detached, unoccupied empty shells
The first rule of responsible shell collecting is simple: never take a shell that's still home to a living creature. For bivalves (clams, scallops, mussels), if the two halves are still tightly closed, tap the shell gently -- if it doesn't open, it's almost certainly alive, and should be placed back exactly where you found it. For spiral shells (conchs, whelks, tulip shells), check for the operculum: the hard, round "trapdoor" that seals the shell opening when the creature is inside. If the operculum is present, the shell is occupied, so leave it be. Even when a shell is empty, don't dig up partially buried pieces, or pry shells off rocks, coral, or seaweed. Partially buried shells are the first shelters hermit crabs check when they're looking for a new home, and prying shells off rocks destroys the intertidal habitat that supports mussels, anemones, and dozens of other small coastal creatures.
Follow local rules, then go one step further
Many coastal areas -- especially national seashores, wildlife refuges, and protected marine parks -- ban shell collection entirely to safeguard vulnerable species, so always check local regulations before you head out. Even in areas where collection is allowed and a daily limit is posted (often 1--2 quarts per person per day), take only what you actually need for a project, not the maximum allowed. It's also critical to skip protected species entirely, even if you find an empty shell: in places like the Florida Keys, for example, empty queen conch shells are legally protected due to overharvest of the live species, and taking them can result in a fine of hundreds of dollars.
Skip large, intact keystone shells
Big spiral shells and large bivalve shells are the most sought-after by hermit crabs, who need intact, spacious shells to grow and avoid predation. If you spot a large, unbroken shell larger than your palm on the beach, leave it for the local hermit crab population -- you can still find plenty of smaller, broken, or chipped shells that are low-impact to take. A good rule of thumb: if the shell is large enough to house a small hermit crab, it belongs on the beach.
Prioritize already damaged or broken shells
Cracked, chipped, or partially broken shells are far less useful to wildlife, so they're the best options to take for crafts or decor. I keep a small canvas pouch in my beach bag just for these cast-off pieces, and I've still managed to find enough unique, beautiful fragments for everything from framed shell art to custom wind chimes, without taking a single intact shell that could be used by a hermit crab. If a shell has living organisms growing on it (barnacles, tiny anemones, algae), leave it too: those growths form a tiny microhabitat that supports a whole host of small coastal creatures.
Avoid disturbing dune and intertidal habitats to find shells
It's tempting to dig through sand dunes or pry apart rock piles to find buried or hidden shells, but this does far more harm than taking a few surface shells ever could. Dune grasses and their root systems hold sand in place and protect inland areas from storm surge, and disturbing them can lead to rapid, irreversible erosion. Intertidal rock pools are home to thousands of tiny, fragile creatures that are killed instantly if you pry rocks apart to get to attached shells. Stick to collecting shells that are already sitting on the surface of the sand, away from dune grass and rocky intertidal zones.
Cut down on new collection by upcycling existing shells
If you love shell decor, check with friends and family first: most people have old shell collections from past beach trips that they're happy to give away. Thrift stores and secondhand craft shops also often have pre-collected shell sets for a fraction of the environmental cost of grabbing new ones from the beach. When you do collect new shells, only take what you need for a specific project, rather than grabbing a whole bucket full "just in case" you think of a use for them later.
You Can Still Enjoy the Magic of Shell Collecting (Guilt-Free)
The best part of responsible shell collecting is that it doesn't take away any of the fun of beachcombing. In fact, learning to spot the difference between a shell that's perfect for your craft project and one that belongs to a hermit crab makes every walk feel more intentional, and more connected to the ecosystem you're visiting. Last month, I spent an hour walking a stretch of Cape Cod beach, picked up three small, chipped scallop shells for a custom picture frame I'm making for my guest room, and left behind a dozen large intact conch shells for the local hermit crab population. It felt way better than the old habit of grabbing every cool shell I saw, and I still got exactly what I needed for my project. If you're new to shell collecting, start small: pick one or two low-impact shells per trip, and spend the rest of your walk observing the wildlife around you. You might even spot a hermit crab moving into one of the large shells you left behind -- a small reminder that the best beachcombing souvenirs are the ones we leave behind, too.